Tunable frequency-selective surface using liquid substrates

De Castro Lima, Antonio Cesar and Parker, Edward A. and Langley, Richard J.
(1994)
Tunable frequency-selective surface using liquid substrates.
Electronics Letters, 30
(4).
pp. 281-282.
ISSN 0013-5194.
(The full text of this publication is not available from this repository)

Abstract

The passband of a convoluted slot array is switched in frequency by exchanging liquid substrates. In the example illustrated, liquid with epsilon(r) congruent-to 2.2 gives a 3 GHz frequency shift and a 16 dB change in the transmission coefficient at 17 GHz.